Locking device for car doors



.Dec. 19, 1922. 1,439,357

,y fr@ /3 LLI ,llLLlLLLLLLLIJL-LLU 11H1 5 H, DULZ. LocKuNG DEVICE FOR CAR DOORS. FILED MAR, 12, 192|.

'5 Illllllllll Patented Dee. 1S, 1922s HERMAN DULZ, F DETROIT, MICHQAN, ASSGNOR 0F GNF-FOURTH TO DECK HAVHANASEAN, OF DETROT, MECHIGAN.

LOCKING DEVICE FR, CAR DOORS.

Application filed March 12, 1921. Serial No.451,913.

To all 'Lo/0m t may concern.'

Be it known that I, HERMAN DULZ7 a citizen of the United States oi America, residing at Detroit, in the county ot' lWayne and v State oi Michigan, have invented certain new andl useful yImprovements in Locking Devices for Car Doors, of which the following is aA speciiication, reference being had therein to the accompanying drawings.

The invention relates to locking devices for car doors and particularly to the sliding type of door. The main object oi the invention is the provision of a locking device engageable with the rear edge or the sliding door andL operable from a position such that a single operator is not able to release the device and at the same time open the door. With this object in view, the invention resides in the novel features of construction and combinations and arrangements of parts as more fully hereinafter set forth.

In the drawings:

Figure 1 is a side elevation or" a portion 25 of a car body with my locking device applied;

Figure 2 is a cross section on the line 2-2 of Figure 1;

Figure 3 is a View similar to Figure 1 showing a modified construction.

1 is the side of the car body and 2 the door slidably mounted in the upper and lower guides 3 and 4 respectively secured to the side 1. 5 is a handle at the forward edge of the door for opening. the same, and 6 the hasp which is commonly used to lock the door in closed position. y

My locking device comprises the locking member 7 engageable with the rear edge ot the door 2 and pivotally mounted upon the side 1 of the car body as at 8, this locking member being located within the elongated slot 9 in the side 1. For yieldably main"- taining the locking member 7 in its outermost or locking position, there is the coil spring 10 surrounding the bolt 11 which extends inwardly from the side 1, this coil spring abutting the inner side of the locking member 7 near its free end and also the nut 12 upon the bolt. To swing the locking member 7 from its locking position, there is the crank arm 13 extending outwardly from the car body and connected to the locking member by suitable means, which in the present instance comprises the shaft 14 invt'egral with the crank arm 13 and rotatably yarm 16 and the locking member.

For the purpose of making it practically impossible for one person to releasethe locking device as well as open the car door, the crank arm 13 is positioned at a distance from the handle 5 upon the door. As shown in Figure 1, this crank arm 13 extends outwardly from the car vbody through an aperture 18 in the side 1 near-the eave, while as shown in Figure 3, the crank `arm extends outwardly through an aperture 19 in the side 1 near the bottom.

1n order to decrease the friction between the locking member 7 and the door 2 when moving thereover, the locking member has the roller 20 pivotally mounted in. its locking end and extending outwardly therebeyond, so that upon sliding the door, its inner surface engages the roller.

Another Jfeature is the location of the lock operating mechanism within the car body with the exception of the outer end oi the crank arm and the outer portion oi' the locking member, this mechanism being enclosed between the inner lining 21 and the side 1 of the car body to protect the same.

From the above description it will be readily seen that I have provided a simple construction oi locking device for sliding car doors which will prevent one person coerating both the device and door to secure entrance into the car. Also7 due to the positions of the crank arms, which are operable to release the locking device, a person operating the same can be more readily seen. Furthermore, my locking. member performs the function oi the cleat which is usually nailed to the side of the car adjacent to the rear edge of the door.

What I claim as my invention is:

1. The combination with a car body, of sliding` door, means within said car body engageable with the rear edge of said door to lock the same in closed position, and manually operable means extending outwardly through said car body :'or releasing said locking means operable from a position nea-r an edge oi the car body side.

2. The combination with a car body, of a sliding door, a locking member within said sliding door, a locking. member within saidk oar body engageable with the rear edge of Said door and pirotally mounted upon said ear body, means for yieldably maintaining said locking member in looking position, and an arm extending outwardly through Said ar body near one oit its corners and oonneoted to said looking; member to move the Same trom looking position.

Li. The combination with a oar body, of a sliding;` door, a looking member within said 'oar body engageable with the rear edge of said door and pivot-ally mounted upon said oar body, a spring engageable with said looking member for retaining the same in locking position, and a Crank arm extending outwardly through said oar body near its roof and connected to said looking member to more the Same .from looking position.

The combination with a oar body, of a sliding door, a looking member pvotally fnounted within said oar body and movable outwardly to engage the rear edge of said door, a Spring Within said oar body for yieldably maintaining said looking member in its looking position, a crank arm extending outwardly through said ear body, Connections 

